/* Main colors and general page styling */
:root {
  --pastel-green: #dfeecb;
  --pastel-blue: #d8edf4;
  --cream: #f8f7ed;
  --dark-green: #173a3c;
  --medium-green: #397379;
  --line: rgba(23, 58, 60, 0.25);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--pastel-green);
  color: var(--dark-green);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

/* Header and navigation */
.hero {
  min-height: 680px;
  max-width: 1200px;
  margin: 28px auto 0;
  padding: 0 7% 80px;
  position: relative;
  overflow: hidden;
  background-color: var(--pastel-blue);
  border: 1px solid var(--line);
  border-radius: 30px 30px 0 0;
}

nav {
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 2;
  border-bottom: 1px solid var(--line);
}

nav a {
  font-size: 0.75rem;
  font-weight: bold;
  letter-spacing: 0.1em;
  text-decoration: none;
}

.logo {
  letter-spacing: 0.16em;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.hero-content {
  max-width: 760px;
  padding-top: 95px;
  position: relative;
  z-index: 2;
}

.label {
  margin: 0 0 12px;
  font-size: 0.7rem;
  font-weight: bold;
  letter-spacing: 0.18em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 30px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(3.5rem, 8vw, 7rem);
  font-weight: normal;
  letter-spacing: -0.055em;
  /* Aquarium survey form */
.survey-section {
  background-color: var(--cream);
}

.survey-heading {
  max-width: 650px;
  margin-bottom: 40px;
}

form {
  max-width: 800px;
  padding: 35px;
  background-color: var(--pastel-blue);
  border: 1px solid var(--dark-green);
  border-radius: 12px;
}

fieldset {
  margin: 0 0 30px;
  padding: 0;
  border: none;
}

legend {
  margin-bottom: 20px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.7rem;
}

form label,
.question {
  display: block;
  margin: 18px 0 7px;
  font-weight: bold;
}

form input[type="text"],
form input[type="email"],
form select,
form textarea {
  width: 100%;
  padding: 12px;
  background-color: white;
  border: 1px solid var(--line);
  border-radius: 5px;
  font: inherit;
}

.choice {
  display: block;
  margin: 9px 0;
  font-weight: normal;
}

.choice input {
  margin-right: 8px;
}

form input[type="range"] {
  width: 100%;
}

.form-buttons {
  display: flex;
  gap: 12px;
}

form button {
  padding: 13px 20px;
  background-color: var(--dark-green);
  color: white;
  border: 1px solid var(--dark-green);
  border-radius: 5px;
  font-weight: bold;
  cursor: pointer;
}

form .reset-button {
  background-color: transparent;
  color: var(--dark-green);
}